Enhancement of Laser-Induced Breakdown Spectroscopic Signals in a Liquid Jet with Glow Discharge
Enhancement of Laser-Induced Breakdown Spectroscopic Signals in a Liquid Jet with Glow Discharge
复制标题
辉光放电液体射流中激光诱导击穿光谱信号的增强
DOI：
10.1177/0003702817738029
复制
发表时间：
2018
影响因子：
3.5
通讯作者：
Ding HB
中科院分区：
文献类型：
--
作者：
Wu Ding;Sun Liying;Liu Ping;Hai Ran;Ding Hongbin;Ding HB
在这项工作中，激光诱导击穿（LIBS）等离子体的流动液体射流在空气支持的辉光放电的存在和不存在的发射信号进行了研究。采用调Q掺钕钇铝石榴石（Nd：YAG）激光器（1064 nm，5 ns），功率密度≥ 1010 W/cm 2，结合针对针辉光放电，从液体射流中产生等离子体。Mg、Ca、Al、Li、Na和K的发射谱线都在辉光放电的存在下显示出显著增强。还观察到较低的连续背景。讨论了谱线辐射增强和连续辐射减弱的机理。
In this work, emission signals of laser-induced breakdown (LIBS) plasma of a flowing liquid jet in the absence and presence of an air-supported glow discharge have been investigated. In combination with a needle-to-needle glow discharge, a Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) laser (1064 nm, 5 ns) with power density ∼1010W/cm2was used to generate a plasma from a liquid jet. Emission lines of Mg, Ca, Al, Li, Na, and K all showed significant enhancements in the presence of the glow discharge. Lower continuum background was also observed. Mechanisms of the line emission enhancement and continuum radiation reduction were discussed.